The least count of Vernier caliper is ________ containing 10 Vernier scale divisions?
Correct answer: C. 0.1mm
- A. 0.001mm
- B. 0.01mm
- C. 0.1mm
- D. 0.0001mm
Explanation
For the usual vernier caliper, 10 vernier divisions equal 9 main-scale divisions, so with 1 main-scale division = 1 mm, the least count is 1 mm - 0.9 mm = 0.1 mm. The likely mistake is choosing 0.01 mm by dividing 1 mm by 100 or assuming a more precise instrument than the one described.
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